This question appears to be off-topic. The users who voted to close gave this specific reason:

"Questions asking us to recommend or find a tool, library or favorite off-site resource are off-topic for Stack Overflow as they tend to attract opinionated answers and spam. Instead, describe the problem and what has been done so far to solve it." – Aziz Shaikh, ChrisF

It is impossible to answer this question in any other way than by saying you should use your favorite search engine without knowing the area and the programming language. For example, Perl has Perl Mongers (pm.org).
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Sinan ÜnürAug 28 '09 at 1:55

2 Answers
2

Just try some searches on Google with the following format "[your city name] Developer User Group" (without the quotes). It's simple but seems to be pretty effective so long as the group has a website.